# Included at the top of each subdirectory Makefile, immediately
# following the local re-definition of DIRNAME

# Push the previous directory onto the 'stack'
sp := $(sp).x
dirstack_$(sp) := $(d)

# Update $(d) to be the current directory
ifneq (,$(d))
	d := $(d)/$(DIRNAME)
else
	d := $(DIRNAME)
endif